Box-covering and corner-staying machine.



Y W. G. CARLSON. BOX COVERING AND 001mm STAYING MACHINE.

APPLICATION FILED JULY 9, 1904.

Patented June 21, 1910.

Witnesses Invemcov Walker C.Cer1s0n.

6 A B K 4 A so W. 0. GAR-LSQN. v BOX COVERING AND CORNER STAYINGMACHINE.

APPLICATION FILED JULY 9, 1904.

961,841 PatentedJune 21,1910.

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BB .4 r I b WALTER C. CARLSON, OF MILWAUKEE, WISCONSIN, ASSIGNOR TOCLARENCE W. HOBBS, 0F WORCESTER, MASSACHUSETTS.

BOX-COVERING AND CORNER-STAYING MACHINE.

Specification of Letters Patent.

Patented June 21, 1910.

Application filed July 9, 1904. Serial 110,215,864.

To all whom it may concern:

Be it known that I, WALTER C. GARLsoN, a citizen of the United States,residing at Milwaukee, in the count-y of Milwaukee and State ofWisconsin, have invented a new and useful Improvement in Box-Coveringand Corner-Staying Machines, of which the following is a specification,accompanied by drawings forming a part of the same, in which- Figure 1represents a side view of a machine embodying my invention. Fig. 2 is atop view of a part of the machine showing the mechanism for feeding,cutting oil and applying the stay strips to the covering machine, andFig. 3 is a vertical sectional view on line 33, Fig. 2.

Similar reference figures refer to similar parts in the different views.

My present invention relates to an improvement in the box covering andcorner staying machine shown and described in Letters Patent of theUnited States, No. 742,343, issued October 27, 1903 to Thomas Morgan. Inthe machine described in the above named patent, the covering strip ofpaper is conducted from a pasting roll to a box held upon a rotatingbox-form and the strips for staying the corners of the box are stuck tothe gummed side of the covering strip in proper position to registerwith the corners of the box as the covering strip is wound thereon.

The object of my invention is to provide means in this class of coveringand staying machines by which the stay strip will be securely attachedto the gummed side of the covering strip, and it consists broadly inemploying upon opposite sides of the covering strip two pressing membersacting conjointly to press the stay strip against the covering strip tocause the two to adhere, and in the detailed construction andarrangement of parts as hereinafter described and pointed out in theannexed claims.

Referring to the accompanying drawings 1 denotes the supportingframework, 2 a coil of covering paper, 3 a coil of stay strip paper, 4 arotating box-form, 5 a gumming roll by which adhesive material isapplied to one side of the covering strip. The covering strip (3 istaken from the coil 2 over the ginnming roll 5 beneath rolls 7 and 8,over rolls 9 and 10 and beneath roll 11 to the box 12 carried on therotating boxform 4. The stay strip 13 is taken from the coil 3 between apair of feed rolls 14 and 15 to a cutting mechanism consisting of afixed shear blade 16 and a reciprocating shear blade 17, by which theindividual stay strips are cut from the end of the continuous stay strip13.

One end of the covering strip 6 is attached to a box 12 carried on therotating box-form 4, and as the covering strip is drawn forward by therotation of the box-form an intermittent motion is given to the feedrolls 14 and 15 by means of pins 19 carried by the boxform and arrangedat the proper period to strike a swinging lever 20 which, by means of apull rod 21 rocks a bell crank 22 in one direction, carrying on one ofits arms a sector 23. The bell crank and sector are reversed by a spring24 and the reciprocating motion of the sector, by means of a pawl andratchet mechanism, imparts an intermittent motion in one direction tothe feed rolls 14 and 15 at the proper period of time to move the staystrip 13 forward a sufficient distance beyond the cutting edge of thefixed blade 16 to form the stay strip. The reciprocating bell crank 22is attached to a rocking shaft 25 which carries radial arms 26, 26, onthe ends of which is supported the reciprocating shear blade 17 which inits upward movement not only serves to sever the continuous stay strip13, but also to carry the detached stay piece upward against the gummedsurface of the covering strip 6.

The construction and operation of the several parts above described arethe same as the corresponding parts in the machine described in PatentNo. 742,343 above referred to and form no part of my present inventionwhich relates solely to means for applying sufficient pressure to thestay piece 13 to cause its adherence to the gummed surface of thecovering strip 6. I accomplish this object by means of a presser bar 28having its under surface preferably lined with a yielding material 29,such as felt or rubber.

The presser bar 28 is carried upon the ends of arms 30, 30, which arecapable of a slight rocking motion on a fixed shaft 31 held in theframework of the machine, and preferably provided with check nuts 32 onits ends to allow the shaft 31 to be rotatively adjusted in theframework. A torsional spring 33 having one end attached t0116 theshaft31 and its opposite end attached to one of the rocking arms 30 serves toexert a downward pressure upon the presser bar 28, the downward movementof the bar 28 being limited by a stop 34 adjustably attached to theshaft 31 and overlapping one of the arms 30. In the normal position ofthe presser bar 28 its yielding face 29 bears against the covering strip6 as it passes from the roll 7 to the roll 8. As the bell crank 22 isreversed by the action of the spiral spring 24 when one of the pins 19leaves the lever 20 the reciprocating blade 17 is moved upward with aquick and forcible blow, severing the stay piece 13 and carrying itagainst the gummed surface of the covering strip 6, the force of theblow being received by the presser bar 28 which is capable of yieldingagainst the tension of the torsional spring 33, thereby graduallyresisting the force of the blow imparted by the reciprocating cuttingblade 17, and causing sufficient pressure to be imparted to the gummedcovering strip 6 and stay piece 13 to cause the two to become firmlyunited. As the covering strip 6 is drawn forward by the rotation of thebox-form, the stay piece 13, now firmly attached to the gummed surfaceof the covering strip 6 in proper position to register with one of thecorners of the box 12, is carried forward with the covering strip. Theforward movement of the covering strip is then continued, the uppersurface of the reciprocating shear blade being provided with a series ofribs 35 having their ends rounded to prevent the scraping of theadhesive material, until at the proper period in the rotation of thebox-form another pin is brought into contact with the swinging lever 20and the operation of severing another stay piece takes place which isattached in the same manner to the gummed surface of the covering strip6 in proper position to register with the next succeeding corner of thebox 12. A stop pin 36 is placed in the framework in the path of therocking bell crank 22 to limit the upward movement of the reciprocatingshear blade 17 or any other suitable means may be employed for thepurpose. The adjustment of the shaft 31 in the framework by the nuts 32enables the force of the torsional spring 33 to be varied.

What I claim as my invention and desire to secure by Letters Patentis 1. In a machine of the class described, the combination with meansfor feeding an adhesive covering strip to a box, of means for attachinga stay piece to saidcovering strip, comprising a movable pressingmember, a fixed shaft, a rocking arm mounted on said fixed shaft, apresser bar carried by said arm, means for exerting a yielding pressureupon said presser bar, and means for holding said presser bar in a fixedplane against said yielding pressure.

2. In a machine of the class described, the combination with means forfeeding an adhesive covering strip to a box, of means for attaching astay piece to said covering strip, comprising a movable pressing member,a fixed shaft, a rocking arm mounted on said shaft, a presser barcarried by said arm, means for supporting a covering strip in a fixedplane, means for exerting a yielding pressure upon said presser bar, anda stop attached to said shaft in contact with said arm for holding saidpresser bar in said fixed plane.

Dated this 16th day of June 190st.

VALTER G. CARLSON.

'lVi tnesses T. BENJ; THoMrsoN, LOUIS STEIN.

